DE102019111455A1 - SPEAKER - Google Patents

Abstract

The invention provides a symmetrical double edge loudspeaker comprising a frame and cone paper, a U-shaped magnet and a voice coil mounted in the frame, wherein a housing chamber is formed in the center of the U-shaped magnet; the voice coil being in the housing chamber; wherein the cone paper has a body and an upper edge and a lower edge bonded to the upper and lower sides of the body; the upper edge and the lower edge projecting upwards and downwards, respectively, forming a symmetrical structure; wherein the cone paper is fixedly connected to the frame via the upper edge and the lower edge; and wherein the lower edge is provided with an air outlet hole. The invention effectively ensures steady upward and downward movement of the cone paper by having symmetrical upper and lower edges up and down, and allows a stiffness coefficient, Kms, to achieve optimum symmetry. Thus, an application requirement for an ultra-thin speaker is met.

Description

TECHNICAL AREA

The invention relates to the technical field of loudspeakers, in particular to a loudspeaker with symmetrical double edge ("symmetrical dual-edge loudspeaker").

BACKGROUND

A conventional speaker usually includes a frame, a cone paper, a voice coil, a damper, and a magnetic assembly; and an associated suspension system consists mainly of a cone edge and a damper combination. Such a construction can better ensure that the tapered paper does not move too easily back and forth during up and down movements, can avoid the undesirable phenomenon caused by abnormal noise, and can greatly improve product stability.

When designing miniature speakers, the damper design is not used. Instead, a magnetic solution is injected into a gap between magnets to stabilize the center of the voice coil and achieve high product stability.

However, given that BL (a driving force parameter) must be satisfied, the space for constructing an edge and a damper is small in an ultra-thin speaker. If a conventional suspension structure is used, then the stiffness coefficient, Kms, can not achieve optimum symmetry.

It is therefore necessary to optimize the existing speaker structure to allow the existing speaker structure to meet the application requirements for an ultra-thin speaker.

SUMMARY OF THE INVENTION

To solve the above-described problem of the prior art, the invention provides a loudspeaker with two symmetrical edges; a cone paper of the loudspeaker is connected to a frame via an upper edge and a lower edge, which are symmetrical, in order to realize up and down movements, so that the movement stability of the product is satisfied.

In order to achieve the above object, the invention provides the following technical solution:

A symmetrical double edge loudspeaker comprising a frame and cone paper, a U-shaped magnet and a voice coil mounted in the frame, wherein a housing chamber is formed in the center of the U-shaped magnet; the voice coil being in the housing chamber; wherein the cone paper has a body and an upper edge and a lower edge bonded to the upper and lower sides of the body; the upper edge and the lower edge projecting upwards and downwards, respectively, forming a symmetrical structure; wherein the cone paper is fixedly connected to the frame via the upper edge and the lower edge; and wherein the lower edge is provided with an air outlet hole.

The upper edge of the conical paper projects upwards and the lower edge protrudes downwards, forming a symmetrical structure; one end of the upper and lower edges is connected to the body of the cone paper and the other end is connected to the frame. The speaker can effectively improve the vibration efficiency of the cone paper by providing top and bottom symmetrical top and bottom edges.

As a further description of the technical solution of the invention, the position at the lower edge where the air discharge hole is located comprises: a side adjacent to the body, the center of the lower edge and a side facing the frame is adjacent.

As a further description of the technical solution of the invention, the body is an integrated structure or a split structure.

As a further description of the technical solution of the invention, the frame comprises an upper frame portion and a lower frame portion; the upper corner, the lower corner and the upper frame portion are integrally formed. Thus, the size of the speaker can be reduced.

As a further description of the technical solution of the invention, the U-shaped magnet in a split structure has an edge region and a central region; the edge region and the lower frame region are integrally manufactured in an injection molding process.

As a further description of the technical solution of the invention, the shape of the upper edge and the lower edge is a ring, a triangle, a quadrangle or a polygon.

With the technical solution described above, the invention achieves the following technical effects:

The invention effectively ensures steady up and down movement of the cone paper in a limited suspension space by having symmetrical top and bottom edges, and allows the stiffness coefficient, Kms, to achieve optimum symmetry. Thus, an application requirement for an ultra-thin speaker is met.

list of figures

• 1 Fig. 12 is a structural sectional view of the symmetrical double edge loudspeaker according to an embodiment of the present invention;
• 2 Fig. 10 is a fragmentary view of the symmetrical double edge loudspeaker according to one embodiment of the invention;
• 3 Fig. 12 is a structural schematic view of the air outlet hole according to the invention, which is arranged on the lower edge;
• 4 Fig. 12 is a vertical view of the symmetrical double edge loudspeaker according to one embodiment of the invention;
• 5 Fig. 13 is a structural sectional view of the symmetrical double edge loudspeaker according to another embodiment of the invention;
• 6 is a Kms graph of a GBS speaker and the speaker with symmetrical double edge; and
• 7 is a THD comparison graph of the GBS speaker and the symmetric double edge speaker.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to facilitate the understanding of the invention, the invention will be described below in conjunction with the drawings and specific embodiments. The drawings indicate preferred embodiments of the invention. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the embodiments are given for the purpose of more thoroughly and comprehensively understanding the disclosures of the invention.

It should be noted that when one element is "fastened" to another element, the element may be directly attached to the further element or may also be attached to an intermediate element; and when one element is "connected" to another element, the element may be directly connected to the further element or it may also be connected to an intermediate element.

To facilitate reading, the local terms "upper", "lower", "left" and "right" are used in accordance with the drawings to indicate reference relative positions of various elements, but not to the present application restrict.

Unless defined otherwise, all technical and scientific terms used in the text have the same meanings as commonly understood by one of ordinary skill in the art. In the text, terms used in the specification of the invention are only used to describe specific embodiments, but are not intended to limit the invention.

Embodiment 1

1 . 2 and 4 give a structural sectional view, and a sectional view and a vertical view, respectively, of the symmetrical dual-edge loudspeaker loudspeaker according to the invention; 3 indicates a schematic structural view of the air outlet hole according to the invention, that at the lower edge 15 is arranged. In conjunction with the 1 to 4 the following is stated: a loudspeaker, in particular a symmetrical double edge loudspeaker comprising: a frame 1 , a cone paper 2 , a U-shaped magnet 3 and a voice coil 4 , where the cone paper 2 , the U-shaped magnet 3 and the voice coil 4 in the frame 1 are attached, which has a supporting action; an accommodation chamber is in the middle of the U-shaped magnet 3 educated; the voice coil 4 is located in the accommodation chamber. A magnetic arrangement 5 having a steel magnet and a spring washer is placed in the center of the U-shaped magnet; the voice coil 4 is located between the U-shaped magnet 3 and the magnetic arrangement.

For the vibration structure of the speaker, the cone paper 2 preferably a body 21 in the middle as well as an upper edge 22 and a lower edge 23 on top of the upper and lower sides of the body 21 are bonded. The upper edge 22 and the lower edge 23 are located on one edge of the body 21 ; the upper edge 22 is upwardly and generally facing away from the magnetic assembly, with one of its ends facing the upper side of the body 21 is bonded; the lower edge 23 is projecting downwardly generally toward the magnetic assembly, with one end thereof toward the lower side of the body 21 is bonded. In the embodiment with the optimized design of the edge structure form the upper edge 22 and the lower edge 23 a down and up symmetrical structure. Therefore, the vibration efficiency of the cone paper becomes 2 effectively improves and it can be ensured that the stiffness coefficient, Kms, reaches an optimal symmetry.

The shape of the upper edge 22 and the lower edge 23 is a ring, a triangle, a square or a polygon and can be adapted to the shape of the speaker. In the embodiment, the upper edge 22 and the lower edge 23 designed to have a protruding ring structure. The other ends of the upper edge 22 and the lower edge 23 are each firm with the frame 1 connected to the cone paper 2 to connect with the frame.

As in 3 shown is the under edge 23 with one or more air outlet holes 231 fitted. In the embodiment, the lower edge 23 with one or more air outlet holes 231 each equipped with one or more of the following positions: an air outlet hole 231A that at one to the body 21 is arranged adjacent side; an air outlet hole 231B which is located in the middle at the lower side of the lower corner; and an air outlet hole 231C on one side of the body 21 is arranged remotely.

The cone paper 1 and the body 21 For example, process requirements may be fabricated as an integrated structure or a split structure. In the embodiment, the body is 21 a shared structure.

Embodiment 2

5 shows a structural sectional view of the speaker with symmetrical double edge according to another embodiment of the invention. As in 5 shown is the body 21 of the speaker an integrated structure, wherein Y-shaped connecting surfaces for bonding the upper edge and the lower edge extending from its edges.

The frame 1 has an upper frame area 11 and a lower frame area 12 on, with the upper edge 22 , the lower edge 23 and the upper frame area 11 are integrally formed and on the side surfaces of the edges are in contact. Thus, the size of the speaker can be reduced.

The U-shaped magnet may also be in a divided structure and has a peripheral area 31 and a middle area 32 on, with the edge area 31 and the lower frame area 12 are produced integrally by injection molding. The border area 31 is then in the middle area 32 arranged. Thus, improvements in the assembly process can be achieved.

The stiffness coefficient, Kms, and the total harmonic distortion (THD) parameter of a conventional GBS speaker (3.5 IN) as well as the symmetrical double edge loudspeaker according to the invention, as illustrated in the above embodiments, were respectively examined. The results are in 6 showing a Kms graph of the GBS speaker and the symmetric double edge loudspeaker; 7 shows a comparison THD graph of the GBS speaker and the speaker with symmetrical double edge.

From the 6 and 7 It will be seen that the symmetrical double edge loudspeakers according to the concepts of the invention each have an extremely symmetrical signal parameter, Kms. This fully reflects that the speaker has a very good up / down movement function. Concerning the THD parameter, there is the THD the speaker with symmetrical double edge also in the distance of 30-70 Hz, which is obviously lower than that of the GBS speaker with a damper.

In summary, the invention effectively ensures the steady upward and downward movement of the cone paper in a limited suspension space by having symmetrical top and bottom edges, and allows the stiffness coefficient, Kms, to achieve optimum symmetry. Thus, an application requirement for an ultra-thin speaker is met.

The above content merely sets forth examples and illustrations of the structure of the invention, but should not be considered as a limitation on the scope of the invention patent due to its specific and detailed description. It should be emphasized that one skilled in the art could make various changes and improvements without departing from the concept of the invention. And the obvious substitutions are all included within the scope of the invention.

Claims (10)

A loudspeaker comprising a frame (1), a cone paper (2) and a magnetic structure and characterized in that the cone paper (2) has a body (21) and an upper edge (22) and a lower edge (23) bonded to the upper and lower sides of the body (21); the upper edge (22) and the lower edge (23) projecting upwards and downwards, respectively, forming a symmetrical structure. Speakers according to Claim 1 , wherein the cone paper (2) via the upper edge (22) and the lower edge (23) with the frame (1) is firmly connected. Speakers according to Claims 1 to 2 wherein the lower edge (23) is provided with one or more air outlet holes (231). Speakers according to Claims 1 to 3 characterized in that the position at the lower edge (23) at which the one or more air exit holes (231) are located comprises one or more of the following: a) a side adjacent to the body (21), b) the middle of the lower edge and c) a side adjacent to the frame (1). Loudspeaker according to one of the preceding claims, characterized in that the body (21) is an integrated structure or a split structure. A loudspeaker according to any one of the preceding claims, characterized in that the frame (1) comprises an upper frame portion (11) and a lower frame portion (12); wherein the upper edge (22), the lower edge (23) and the upper frame portion (11) are integrally formed. A loudspeaker according to any one of the preceding claims, wherein the magnetic structure comprises a U-shaped magnet (3) and a voice coil (4) mounted in the frame (1), with a housing chamber in the middle of the U-shaped magnet (3 ) is trained; wherein the voice coil (4) is located in the accommodation chamber. Loudspeaker according to one of the preceding claims, in particular according to Claim 7 characterized in that the U-shaped magnet (3) in a split structure has an edge portion (31) and a central portion (32); wherein the edge portion (31) and the lower frame portion (12) are integrally formed in an injection molding process. Loudspeaker according to one of the preceding claims, characterized in that the shape of the upper edge (22) and the lower edge (23) is a ring, a triangle, a quadrangle or a polygon. A loudspeaker according to any one of the preceding claims, wherein the loudspeaker is a symmetrical double edge loudspeaker.

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